ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,540,052, issued on Feb. 3.
"Elevator system" was invented by Josef Husmann (Lucerne, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "An elevator system includes an elevator car movable in an elevator shaft, a suspension means extending in the elevator shaft, a drive machine associated with the suspension means and a controllable coupling apparatus arranged on the elevator car. The suspension means has a coupling element that the coupling apparatus can be coupled to by assuming a coupled position and from which the coupling apparatus can be uncoupled by assuming an uncoupled position, as a result of which a drive connection between the elevator...